INVESTMENTS IN SECURITIES (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014 Cash Equivalents [Member]	Dec. 29, 2013 Cash Equivalents [Member]	Jun. 29, 2014 Other [Member]	Dec. 29, 2013 Other [Member]	Jun. 29, 2014 Available For Sale Securities Current Investments [Member]	Dec. 29, 2013 Available For Sale Securities Current Investments [Member]
Fixed income securities, Amortized Cost					$ 177,653,000	$ 103,121,000	$ 22,724,000	$ 56,000	$ 0	$ 96,902,000
Fixed income securities, Fair Value					177,653,000	103,124,000	22,728,000	56,000	0	96,902,000
Realized gain on sale of securities	100,000	0	300,000	0
Realized loss on sale of securities	$ 0	$ 0	$ 0	$ 0